Infineon’s Xensiv SP49 is specifically engineered for smart tire functionalities, including on-tire auto-position sensing, support for inflation, blowout detection, and load sensing. The sensor combines MEMS sensors and ASIC, offering advanced features for tire pressure monitoring systems. It includes a robust 32-bit Arm M0+ core, ample flash memory and RAM, Low Power Monitoring (LPM), and enhanced acceleration sensing. The SP49 is well-suited for intelligent tire functions like automatic tire positioning, tire inflation support, blowout detection, and load sensing.
Infineon notes that the SP49 serves as a direct replacement for their previous SP40 TPMS products, featuring compatibility in terms of pin-to-pin configuration. It offers extensive hardware support with its master/slave IC interface and software-simulated UART, SPI, and PWM interfaces, making it suitable for sub-1GHz applications and adaptable for BLE TPMS. This sensor provides a high level of integration, streamlining the implementation of a modern TPMS module, and thanks to its integrated microcontroller, sensors, and convenient peripherals, it only requires a few passive components to create a complete TPMS sensor unit. Furthermore, the SP49 is designed for efficient power usage, making it well-suited for battery-operated applications.
Apart from its capacity to trigger a wake-up signal through the built-in interval timer, SP49 products are well-suited for autonomous remote pressure sensing solutions demanding minimal power usage. In such scenarios, the LF receiver with wake-up functionality and exceptional sensitivity allows for measurements to be taken when needed.